[AMPS] linear amps

[Eric Moore]

> Examples of GG tubes that often need neutralized include the
> 3CX1200A7 and D7, pairs of 572B's, and (4) 811A's. The reason
> they need neutralized is the long grid leads and poor
> cathode/anode shielding inside the tube allows a considerable
> amount of feedback capacitance from anode to cathode.

The 30L-1 does not have neutralized tubes, so apparently 811A'a do not
absolutely require it.



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